A surveillance camera in a Farmer's Co-Op Store in Pilger, Nebraska caught the terrifying moment that one of the twin EF-4 tornadoes swept through the town last month, demolishing a large part of the building in mere seconds.

The video is about ten minutes long — skip to the 1:00 mark for the "action," if you will. A few minutes after the tornado sweeps through, the people who sought refuge in the back of the store return to survey the damage. The video is a testament to the power of tornadoes; it took seconds to go from relative calm to utter calamity.